wood, catalpa, beech, and uvercup, cow. swamp Spanish, and Schneck's 

 oaks are not native to the bottomlands of the northern region at all. Elm 

 and soft maple form about 57 per cent of the forest in the northern re- 

 gion, but only 21 per cent in the southern part. In the north the oaks, 

 ashes, and hickories form 11 per cent; in the south, 6G per cent of the 

 forest. Soft maple, the commonest tree in the northern bottomlands, 

 makes up 4;? per cent of the stand ; while pin oak, the commonest tree in 

 the southern bottomlands, makes up but 20 per cent of the total stand. 

 Pecan is an occasional tree in the bottomlands of the Wabash, Ohio, lower 

 Kaskaskia, lower Illinois, and entire Mississippi, rivers — extending to the 

 Wisconsin line on the Mississippi — but does not grow on bottomlands of 

 the Big Muddy or Rock rivers and rarely on those of the Cache. 



Acreage and Estimated Yields of Bottomlakd Forests by Riv:;i;s 



River system 



Wa- 

 bash 



Big Kas- 

 Muddy kaskia 



Illinois Rock 



Missis- 

 sippi 



• In the Yields column. C = culled forest, merchantable trees removed; S = sap- 

 lings; Nn. 1 = stands having an estimated yield up to 20no B. F. per acre: No. 2 

 = stands having an estimated yield from 2000 to 5000 B. F. per acre; No. 3 = stands 

 having an estimated vield from .tOOO to 10000 R. F. per acre; No. 4 = stands hav- 

 ing an estimated yield over lOnOO B. F. per acre. 



The Wabash River System 



Included in this system are the bottomlands of the Saline, Wabash, 

 Little Wabash, and Embarras rivers. With the exception of the Wa- 

 bash, these are comparatively small streams ; yet, owing to the general 

 flatness of the country, they have bottomlands out of all proportion to 

 the size of the stream. The soils of the Saline, Little Wabash, and 

 Embarras bottoms, grading toward clays, are generally heavy and gray- 

 ish in color ; those of the Wabash, grading toward sands, are generally 

 light. Both are very fertile. The streams have a low gradient, and 

 water stands for considerable periods in the extensive swamps. Drain- 

 age projects are reducing the area subject to flooding, yet this region still 

 has 207.9!)1 acres of wooded bottomland out of an original area of 7-'16,457 

 acres wooded — about 2S per cent. 



